Apparatus for treating metal-coated articles to insure uniformity of coating



Aprll 7, 1931. J, w MOON 1,799,760

APPARATUS FOR TREATING METAL COATED ARTICLES TO INSURE UNIFORMITY OFCOATING Filed Dec. 7, 1928 (/oln M0072 W/TIVES Patented Apr. 7,1931

-um'ran STAT-ES:

SIGNMENTS, TO FBETZ-MOON TUBE- OOH a conroanrron or rmsirnvanra PATIENT,ar s.

Jorm w. moon; or nurm'rmmsynvmm, assranon, BY manor AND MESNE AS- rmr,mo, or BUTLER, rnnnsnvnnm,

Lrrana'rns non 'rnmvrmq man-comm) .m'rroms r msuan unmonntrry or commaApplication. filed December 7, 1928'. Serial 110. 824,467.

The object of my invention is to provide an improved means for removingsurplus hot metal from pipes, tubes, rods, bars, .etc., as

I .of the series are preferably idler-s of relathey are pulled orconveyed from a galvanizmg tank containing hot metal with which sucharticles have been coated while immersed therein, the specific objectbeing to properly and automatically position the article during suchoperation and insure the removal of surplus metal from all art'sof' thesurface of the article with resu tant retention of a coating of uniformthickness.

An apparatus embodying the invention in a preferred form is disclosed inthe drawings', in which Fig. 1comprises aside elevation of a conveyingapparatus, a partial sectional view of the tank, and an elevation of thesurplus metal-removing device prop-' erly positioned relatively to thetank and the conveying means; Fig. 2 is anenlarged front view of thedevice from which air is blown onto the article as it is being deliveredfrom the tank; and Fig. 3 is a vertical sectional view of the device ofFig. 2. v

, Beyond a tank a, containing the hot metal withwhich' the pipes, tubes,rods,,bars, or other articles of elongated contour, are coated whileimmersed therein, is a frameb, ,on

which are supported a series of rollers. The first two rollers c, d, arepreferably of relatively large diameter an one or both arepositivelydriven. The remainingu'ollers e tively smalldiameter. Therollsare so arranged that a tangent common to their peripheries and which iscoincidentwith the line of travel of the article extends throu habout-the center of the ring 9 hereinafter escribed. By means of theserollers the pipes are positively'conveyed from the tankto the cooling.racks or other desired point of de- Iivery.- I I Positioned on the frame6, between the tank a and the first roller (1 of the series, is

an upright stationary pipe-sor'tube f, which 1 at its top supports, andcommunicates with the interlor of, a hollow r ngg. The ring is rovidedwith a series of holes 72. arranged tank, and conveyin cated about onthe axis of the article while the same is being conveyed along theconveyor bed.

- Through the pipe or tube 7 and hollow ring 9 is forced airor othersuitable fluid, which is thereby forced out of the hole It onto theexterior bf the traveling article and blows fromits surface surplusmetal, thereby insuring that the finished article will have ametalcoating of uniform thickness.

The rollers o, d, are rendered magnetic by any suitable field winding(not shown) thus insuring that the article being conveyed; whichfunctions as the armature of the magnet, will be held insuch position,after it engages rollers a and d, that it will extend through about thecenter of-the ring g.

Instead of arranging the rollers a and (1 below the line of travel ofthe articles, they may be' above the line of travel of thearticles, asdisclosed in an a plication filed by me of even date herewith, erial No.324,466.

The invention does not exclude the substituadapted to be conveyed fromthe tank, said ring having a circular series of holes 0 ening towardabout a common point iii ahout the line of travel of said articles fromthe mechanism adapted to hold the article in t e course of its travel ina line coinciding substantially with the cen-. terofthe rin whereb fluidforced out of the ring and discharge from the holes will be so directedthat it will act with substantial uniformity on the circumference of thearticle being conveyed.

2. The combination, with a tank adapted to contain hot metal and@receive elongated articles to be coated with such metal, of a conveyingmeans comprising a series of rollers one or more of which aremagnetized, and a hollow ring positioned between the tank and theconveying means, the ring being so positioned that a tangentcommon tothe peripheries of the rolls extends through the space enclosed by -saidring, the ring having holes arranged around it and opening approximatelytoward said tangent.

In testimony of which invention, I have hereunto set my hand at Butler,Pa., on this 3rd day of December, 1928.

JOHN W. MOON.

